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A137539
as a simple table
n
a(n)
0
1
1
1
2
2
3
6
4
23
5
104
6
532
7
3005
8
18453
9
121853
10
858239
11
6406401
12
50422167
13
416666542
14
3602203962
15
32481902733
[1,1,2,6,23,104,532,3005,18453,121853,858239, 6406401,50422167,416666542,3602203962,32481902733]
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Last modified September 6 11:05 EDT 2024. Contains 375712 sequences. (Running on oeis4.)
